Methods and systems for distinguishing between radar signals and Wi-Fi signals are provided. When a set of electromagnetic signals are received, various tests are performed on the signals to determine if the signals are associated with radar pulses or if the signals are more likely to be associated with stray Wi-Fi signals or other non-radar interference. One such test relies on the relatively small variance of frequencies used by radar pulses when compared to the high variation of Wi-Fi signals. Another test relies on the relatively low peak to average power ratio of signals associated with radar pulses when compared to Wi-Fi signals. The tests described herein are an improvement on existing methods for distinguishing radar signals from Wi-Fi signals and result in less switching of Wi-Fi channels due to erroneously detected radar signals.
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3. The method of claim 1, wherein the first communication channel is a DFS Wi-Fi channel.
4. The method of claim 1, wherein the computing device is an access point.
5. The method of claim 1, wherein determining whether the set of electromagnetic signals are radar signals comprises determining whether the calculated variance satisfies a variance threshold.
6. The method of claim 5, wherein the calculated variance satisfies the variance threshold when the calculated variance is less than the variance threshold.
9. The method of claim 8, wherein the calculated ratio satisfies the ratio threshold when the calculated ratio is less than the ratio threshold.
10. The method of claim 1, wherein the set of electromagnetic signals comprises one or more of on-channel and off-channel corrupted Wi-Fi frames or off-channel power leaks.
13. The method of claim 11, wherein the first communication channel is a DFS Wi-Fi channel.
14. The method of claim 11, wherein the computing device is an access point.
16. The method of claim 15, wherein the calculated ratio satisfies the ratio threshold when the calculated ratio is less than the ratio threshold.
18. The method of claim 17, wherein determining whether the set of electromagnetic signals are radar signals comprises determining whether the calculated variance satisfies a variance threshold.
19. The method of claim 18, wherein the calculated variance satisfies the variance threshold when the calculated variance is less than the variance threshold.
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October 27, 2021
February 20, 2024
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